Koizumi Hiyori
小泉 ひより
| Koizumi Hiyori小泉 ひよりAB | |
| Aliases | Hiyo-sensei, Hiyohiyo |
| Measurements | Height: 164cm, Weight: 48kg, Bust-Waist-Hips: 73-57-89cm |
| Birthday | 15 January |
| Hair | Asymmetrical Sidehair, Parted to Side, Violet |
| Eyes | Red |
| Body | Mole, Pale, Slim, Young-adult |
| Clothes | Earrings, Skirt Suit |
| Personality | Clumsy |
| Role | Older Sister, Teacher, University Student |
| Visual novels | Main character - Cosmos no Sora ni |
DescriptionAlumnus of Nanasaka High School who now works in her former school as trainee-teacher. She currently manage class 2-B where the protagonist is at. She is also the older sister of Marine. | |